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SPARQL的语义和复杂性

Semantics and Complexity of SPARQL

Jorge Perez, Marcelo Arenas, Claudio Gutierrez

摘要:

SPARQL是RDF的W3C候选推荐查询语言。在本文中,我们系统地解决SPARQL的形式化研究,集中在它的图形模式设施。我们认为这项研究的一个片段没有文字和一个简单的版本的过滤器,其中包括所有的主要问题,但简单的形式化。我们提供了一个组成的语义,证明有范式,证明复杂性的界限,除其他外,SPARQL模式的评价是PSPACE完成,比较我们的语义替代操作语义,给简单和自然的条件时,语义一致,并讨论优化程序。

英文摘要:

SPARQL is the W3C candidate recommendation query language for RDF. In this paper we address systematically the formal study of SPARQL, concentrating in its graph pattern facility. We consider for this study a fragment without literals and a simple version of filters which encompasses all the main issues yet is simple to formalize. We provide a compositional semantics, prove there are normal forms, prove complexity bounds, among others that the evaluation of SPARQL patterns is PSPACE-complete, compare our semantics to an alternative operational semantics, give simple and natural conditions when both semantics coincide and discuss optimizations procedures.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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